kc3-lang/gnulib/lib/isnanl.h

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• Hash : 814389d9
  Author :
  Date : 2008-01-26T15:45:42
  

  Use the GCC built-in __builtin_isnanl (if it works).
  

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• lib/isnanl.h

• /* Test for NaN.
     Copyright (C) 2007-2008 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #if HAVE_ISNANL
  /* Get declaration of isnan macro or (older) isnanl function.  */
  # include <math.h>
  # if __GNUC__ >= 4
     /* GCC 4.0 and newer provides three built-ins for isnan.  */
  #  undef isnanl
  #  define isnanl(x) __builtin_isnanl ((long double)(x))
  # elif defined isnan
  #  undef isnanl
  #  define isnanl(x) isnan ((long double)(x))
  # endif
  #else
  /* Test whether X is a NaN.  */
  # undef isnanl
  # define isnanl rpl_isnanl
  extern int isnanl (long double x);
  #endif
  

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